Improvement in stench-traps



i 4UNITED STATES PATENT OFFICE.

DANIEL O. STILLSON, OF CHARLESTON/VN, MASSACHUSETTS.

IMPROVEMENT IN STENCH-TRAPS.

'Specification fprming part of Letters Patent No. 110,087, dated December 13, 18.70.

To all whom it may concern.:

Be it known that I, DANIEL C. STILLsoN, of Charlestown, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Stench-Traps; and I do hereby declare the same to be fully described in the following specification and represented in the accompanying drawings, of which- Figures l and 2 denote central and longitudinal sections of my said invention, taken in planes at right angles to each other. Fig. 3 is a side elevation thereof.

My invention has reference to that class of devices which is applied to the, waste-pipes of sinks for preventing the stench or noisome cffluvia, generated in the drains or cesspools with which such sinks may be in communication, from rising or escaping into the rooms or apartments in which such sinks may be.

I am aware that various means have been devised and many expedients resorted tofor remedying' this evil, and that mechanism has been so constructed and applied to the sink and sewer-pipe as to cause the water itself, in passing from the sink to the sewer, to constitute a stench-tight valve.7 7 Therefore I make no claim to such principle in the abstract.

The object had in view in making my invention was not only to produce a simple and reliable means for accomplishing such result, but also to provide a means whereby the device should be prevented from becoming inoperative by the freezing vof the water therein during extreme cold weather, as well as to afford a means whereby the auxiliary pipe, should it become fouled or clogged, could be readily cleared of obstructions; and my inven- A tion consists in so combiningwith the main pipe or the main and auxiliary pipes a stop-cock, so constructed and arranged that by turning the latter in one direction a water-valve77 or liquid diaphragm impervious to stench shall be formed, while, by turning it in the opposite direction the liquid forming the said valve shall be discharged or drawn off and a direct passage be opened through the main pipe.

In the said drawings, A denotes a portion of the main waste or drain pipe, whose ripper yend is to be attached to a sink, the said pipe being provided with a stop-cock, B, (having a passage, c, made transversely through its plug or frusto-conical valve d,) formed and applied thereto, as shown in Fig. l.

D is a bent tube, whose inner diameter or bore is of a somewhat greater size than either of its arms a b, the object of such enlargement being to `form an air-chamber in the upper part of the tube. rlhe shorter arm, a, is connected to and opens into the main pipe just above the cock B, as shown in Fig. 1, while the other arm, Z, extends down and opens into the said main pipe below the cock, as seen in such gure.

E is an opening or port made in the upper wall of the pipe D, the same being provided with a screw-plug, F. The object of the said port is to enable the tube or its arms to be readily cleared of any obstruction, should it become necessary.

Having described the device as shown in the drawings, the operation thereof is as fol-A lows: If we suppose the upper end of the-pipe A to be attached to a sink and its other end to be connected with a drain-pipe or sewer,

we rst shut the cock B, and thereby pre vent the iiowage of the water in a direct line through the main pipe, and cause a diversion thereof upward and through the pipe D. By the peculiar construction of such latter pipe and its arrangement with respect to the cock B and the pipe A, a column of water will always remain (in accordance with the wellknown law of the equilibrium of iiuids) at the same height in the pipe A and the arm a of the pipe D, whatever may be the relative length or capacity of the two. In the present case the water-line will be shown by the dotted line x a: in Fig. l. rlhis column of liquid constitutes what I term the water-valve. The opening c of the arm a being at a point below the said water-line, such water serves as a diaphragm or impassable barrier to the unwholesome odors generated in the drain or sewer.

I do lnot limit my invention to the precise form as shown and described, as such may be somewhat variedI and still-contain the principle of my invention. p

From the above it will be seen that while the device or trap is in use, although the water is allowed to iiow freely through it, yet a suffi.- cient volume is retainedto always maintain the orifice or mouth c of the armv a submerged, and thereby rendering it impossible for any noisome euvia to rise up and escape through l by turning the latter in one direeter a Waterit; also, that the cock affords a ready nieans of letting off the Water constituting the Watervalve, so as to prevent the freezing thereof during extreme cold weather.

Vhat I claim is as follows: The combination, With the main diseharge- Vitnesses: pipe of a sink, of an auxiliary pipe, D, or duet, F. l?. HALE,

seal77 shall be formed, While by turning it in the opposite direction the liquid forming such seal shall be discharged through the main pipe, in manner and for the purpose set forth.

' DANIEL C. STILLSON.

and a stop-e0ek7 B, so formed and arranged that F. C. HALE. 

